title: Plexiform fibromyxoma (plexiform angiomyxoid myofibroblastic tumor) of stomach: an unusual presentation as a fistulating abscess.
abstract: Plexiform fibromyxoma (plexiform angiomyxoid myofibroblastic tumor) is a rare benign mesenchymal tumor of stomach. The plexiform growth of bland-looking spindly cells in a richly vascularized fibromyxoid stroma is distinctive. The described cases are solid tumors associated with ulceration, with the patients presenting with symptoms related to the ulcer or mass effect of the tumor. We report an unusual case presenting as a fistulating abscess. A 42-year-old woman presented with abdominal pain, fever, and elevated white cell count. Computed tomography scan revealed a 12-cm cavitating mass in the gastric antrum, with fistulation to the gastric lumen through an ulcer. Histologic examination showed transmural involvement of the stomach by plexiform islands of fibromyxoid tumor with interspersed delicate capillaries. There was a pseudocyst-like component. The unusual presentation therefore broadens the clinical and pathologic spectrum of this rare tumor type.
authors.affiliation: 1Queen Elizabeth Hospital, Hong Kong SAR.
authors.forename: Peter W T
authors.initials: PW
authors.lastname: Lee
authors.forename: Derek T W
authors.initials: DT
authors.lastname: Yau
authors.forename: Patrick P L
authors.initials: PP
authors.lastname: Lau
authors.forename: John K C
authors.initials: JK
authors.lastname: Chan
mesh_terms: D000038:Abscess / Q000209:etiology / Q000473:pathology; D000328:Adult; D005260:Female; D005350:Fibroma / Q000150:complications / Q000473:pathology*; D005402:Fistula / Q000209:etiology / Q000473:pathology; D006801:Humans; D013274:Stomach Neoplasms / Q000150:complications / Q000473:pathology*
keywords: plexiform angiomyxoid myofibroblastic tumor; plexiform fibromyxoma of stomach